Canada Evacuated tube heat pipe solar collector 1.OEM provide 2.SOLAR KEYMARK,SRCC,CE 3.Antifreezing -40 degree Canada Evacuated tube heat pipe solar collector ... Specificationssolar collector; 1,Size:58/1800,47/1500 2,CE,SRCC,Solar keymark 3,Lifetime ... 58-1800-30220-30058*180030.004.2061/152 Canada Evacuated tube heat pipe solar collector